What does (: ) stand for?

(: ) stands for "Bald smiley"

How to abbreviate "Bald smiley"?

"Bald smiley" can be abbreviated as (: )

What is the meaning of (: ) abbreviation?

The meaning of (: ) abbreviation is "Bald smiley"

What does (: ) mean?

(: ) as abbreviation means "Bald smiley"